Improvement in windmills



dirimitatr strut @tithe Letters Patent No. 92,030, dated June 29, 1869.

IMPRQVEMENT IN WINDMILLS.

-The Schedule referred to-in these Letters Patent and making parl: of the lama.

To whom it may concernl Beit known that I, FREDERIUJ. FoRsY'rH, of Au y Sable, in the county of Iosco, and State of Michigan,

have invented a new and useful Improvement in Windmills; and I do declare that the following is a true and accurate description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, and being a part of this specification, in whichA Figure I is an elevation of my invention;

Figure 2 is a section, showing the method of operating the adjustable stops; and

Figure 3 is a front and end elevation of one of tli"e wings.

Like letters refer to like parts in each figure.

The nature of this invention relates to an improvement in wind-wheels; and. consists in the peculiar arrangement of its various parts, as more fully hereinafter shown.

A, in the drawings, shows a frame-work, surmounted by a table or platform, B, through which, centrally, passes the upright shaftD, 'rotating in a step, D, and

`supported by a iianged collar, E, revolving uponvfriction-rollers a. A collar secured to the shaft at the proper point, rotates with it within an anti-friction bearing, F, guiding the shaft in its movement..

Secured to the shaft are flanges G, from which radiate thearms H, carrying the wings I, the arms being strengthened and bound together by the Vertical braces J. g

Ihe wings I are vertically pivoted, at one side of their centres, to the arms H, and have va rectangular opening in their shorter arms.v

Arranged to close this opening, is a series of panels or slats, b, longitudinally pivoted to the sides of the opening, connected together by a wire and staples, as are the slats of a window-blind.

Secured'to one of these slats is a crank, c, rotating in a proper bearing, audto which is attached avane, K, which, when the wind is violent, rises, and opens the slats b, causing the wings to present a. lesser' area to it, and thereby diminishing the velocity ofthe wheel. l

These wings, from the manner in which they are hung, would act as Yanes when the force of the wind acts against them; but four of them, two in the upper, and two in the lower, and on the same side of the wheel, are arrested by a pin, L, projecting from' the outer side of their corresponding vertical braces, and compel them to present their broadsides to the wind until they have passed out of its direction, when they swing loosely on their pivots, coming up into-it edgewise, until they have again passed into its course, when each ofthe four vanes, successively, are arrested by the pins, as described; and communicate the brce of the .wind to the wheel.

The four remaining wings are arrested by the pins l M, passing -up through the arms, as shown, and are operated by the levers N and links lO, sliding in grooves in the shaft C, and connected to al sliding collar, P, which, in turn, is raised and lowered by the lever Q and rod R.

When the pins M project above the arms, so as to arrest the wings, they will operate as those already described, but when withdrawn, the wings will swing loosely in the wind, and the wheel will remain stationary.Y

The ends of the arms may be stayed by a light mel tallic rod, passing around the wheel, and securing them in position.

1 do not pretend that any of the devices used by me are absolutely novel, for I believe that each of them may be found in this, or some other class of inventions. I do believe, however, that I have brought together and combined these devices in a new, ingenious, and valuable manner.

It is evident that the result to be attained is to vmake'snch use of annncertain and capricious power,

that it may, so far as possible, impart a steady, uniform motion to machinery. lothis endit is essential to get the greatest possible power from the light est breezes, to regulate the motive-v power of the stronger winds, and to protect against the violence of rales. i v By the use of the double sets of wings, I am able to-present a large surface to light breezes, without an inadequate lengthening and weakening of the supporting-arms, and at the same time, by the use ofthe automatic device for presenting the edges of the wings, in returning against the wind, and by the rollers at the base of the shaft, and to the bearing-collars, Iam

able to impart a greater power, with less loss by friction of air or machinery, than is done in any other windmill with'w'hich I am acquainted; And in winds of greater forcethe devices used by me for regulating the'exposnre of surface, are simpler,'more easily Y managed, `and more effective than yothers in use.

What I claim as my invention, and desire to secure by Letters Patent, is

The arrangementof the wings I, the vanes K, the arms H, the braces J, the levers' N and Q, the pills L and M, the links O, and the ilanges G, in combination with the shaft C, with its step D, collar E, and rollers a, and anti-friction bearing F, in connection with frame A and platform B, when constructed and operating as aforesaid.

FREDERIC J. FORSYTH.

Witnessesi JOHN F. ALBREE, J'. O. PEnRINE. 

